"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
The good news is that, according to the Obama administration, the rich will pay for everything. The bad news is that, according to the Obama administration, you're rich.